Computer Science for IGCSE & O level - Data Transmission (Section 13 - No. 18)
What are the functionalities of ARQ?
Positive acknowledgements indicate successful reception.
Negative acknowledgements indicate data integrity has been damaged during transmission.
A timeout mechanism to retransmit.
ARQ protocols enhance data encryption.
Explanation
ARQ employs acknowledgements, negative acknowledgements, and timeouts to ensure reliable data transfer.